GB725432A - Improved collet chuck - Google Patents

Abstract

725,432. Chucks. BRANDHANDLER, F., and DENZLER, B., [trading as DAVOS PRODUCTS CO.]. Feb. 10, 1953 [Feb. 14, 1952], No. 3771/53. Class 83 (3). A bevel-closing chuck comprises a body 10, an interchangeable cored adapter 24 press-fitted into the body, and a collet 22 adjustably screwed to a draw ring 28 which is engaged by levers 74 pivoted on the body and moved to close the chuck by a cone surface 90 on a sleeve 84 sliding on the body. Means for locking the collet to the draw ring in its adjusted position comprise either a loose ring 26, Fig. 3, keyed to the rear end of the collet by a pin 108 and locked by a set screw 112 (not shown) extending from the outside of the body to engage an annular groove 114 in the ring 26 or by a ring 261, Fig. 6, having a lug 1081 engaging a groove 1101 in the forward end of the collet and locked by diametrically-opposite set-screws 1121 extending through the ring to engage a groove 291 in the housing 10<SP>1</SP>. A fixed pin engaging a slot in the draw ring prevents it from rotating relative to the body. The operating sleeve 84 is actuated either by a yoke lever 98 or by moving manually an outer sleeve 116<SP>1</SP> rotatable on the operating sleeve and, as shown in Fig. 3, the cone surface 90 may be followed by a cylindrical surface 91 for locking the levers 74 in the closed position. The collet is moved to the open position by a spring 42 or 42<SP>1</SP> bearing on a spring circlip 44 or on a retaining member 44<SP>1</SP>. The interchangeable adapter 24 is not provided in the version of Fig. 6 and a cone surface 54<SP>1</SP> is formed on the body 10.